I'm using Amsoil & have been for the past 5 years. Still on my original tranny, (touch wood) (touching head as I type) & I tow very heavy & no problems to date. So to me, No Mercon, is No Issue, in my mind. I would say, go to a GOOD quality synthetic & you should have no problems. JMHO. /ubbthreads/images/graemlins/smile.gif /ubbthreads/images/graemlins/smile.gif
Reg